Air circulator and heater



Aug. 13, 1929. H. v. DEEMAR AIR GIRCULATOR AND HEATER Filed May 3.8,1927 3 Sheets-Sheet INVENTOR ge/121g L/ee' WITNESSES TILJ? MM5 ATTORNEYS Aug. 13, 1929. H. v. DEEMAR All( CIRCULATOR AND HEATER Filedv May.18, 192'? 5 Sheets-Sheet ATTORNEYS Aug. 13, 1929.

H. v. DEI-:MAR 1,724,752

AIR CIRCVULATOR AND HEATER Filed May 18, 1927 3 Sheets-Sheet 3 21' Vif'E l 4 4 @f Nm wma' KE W 7V J Q i 31 ATTORNEYS Patented Aug. 13, 1929.

UNITED STATES PATENT OFFICE.

HENRY V. DEEMAR, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO HERBERTH. DEEMAR, OF LOS ANGELES, CALIFORNIA.

AIR CIRCULATOR AND HEATER.

Application led May 18,

This invention relates to a heater for homes and other places in whicheither gas or electricity may be employed as the heatingmedium.

I' A'primary object of the invention is to so construct a heater of thischaracter that it will radiate heat and at the same time circulate freshair, either with or without the aid of a blower.

V Another object is to provide a heater having hollow standpipes for thepassage of fresh air therethrough and which is equipped with means forheating the air in these pipes without contaminating it.

l In carrying out these objects, the invention is susceptible ofmodification without;

departing from the spirit or sacrificing any of the advantages of theclaimed invention;

there being shown in the drawings for illustrative purposes, certainpreferred and practical forms in which;

Figure 1 represents a vertical section of a heater constructed inaccordance with this invention, and in which a gas burner is employed,as the heating element,

Fig. 2 is a horizontal section taken on the line 2 2 of Fig. 1,

Fig. 3 is a transverse section taken on the line 3 3 of Fig. 1,

Fig. 4 is a view similar to Fig. l, with a blower shown used inconnection therewith for passing the fresh air through the stand Pipes,

Fig. 5 is a transverse section taken on the line 5 5 of Fig. 4,

Fig. 6 is a detail sectionalV view takenon the line 6 6 of Fig. 4,

Fig. 7 is a vertical sect-ion, with electrlc heating coils shown as theheating medium,

Fig. 8 is a horizontal section taken on the line 8 8 of Fig. 7, and

Fig. 9 is a diagrammatic view showing the arrangement of the heatingcoils in groups and the means for controlling them.

In the embodiment illust-rated in Figs. 1 to 3, a casing 1 is showncomposed of sheet iron and which may be of any desired cross sectionalconfiguration, being here shown cylindrical. This casing 1 is supportedby 50 legs 2, mounted on an annular frame 3 which supports above it afuel mixing chamber, the bottom of which is apertured to receive 1927.Serial No. 192,349.

at the side of the heaterv through a feed pipe 17, said feed pipe beingequipped with a bathe 18 in the form of a screen for breaking up thefuel before its entrance into the mixing chamber. The fuel supply pipe17 has a mixing nozzle located at' its outer end composed of an outercasing 19 .through which gas is fed and an inner casing 19a of smallerdiameter than the casmg 19, both of which have tapered nozzles at theirdischarge ends and through which air and gas are discharged into thepipe 17. A gas supply pipe 7 opens into the casing 19 through one sidewall thereof and is provided with a cut-off cock 8 for controlling thesupply of gas thereto while a valve 9 controls the air entering throughcasing 19.

A'flame shell 20 is arranged within the casing 1 concentric therewith,being spaced slightly therefrom to provide between it and said casing anair space or chamber 21` which is supplied with air by means of aplurality of tubes 6 extending upwardly through the mixing chamber anddischarging into the chamber 21. The top l of the casing 1 is providedoutside the openings through which the stand pipes 10 pass with aplurality of apertures 21el which communicate' with the chamber 21 andthrough which the heated air from said chamber is discharged. The flameshell 2() shields the casing 1 from -the iame of the burner, andprotects the enamelling or finish of the casing while the space betweent-he casing and the shell afy fords additional heating surface andincreases the hot air heat-ing capacity.

Any desired number of hot air or stand pipes 10 may be employed, sixteenbeing here shown. These pipes extend through the mixing chamber of theburner to and through the top plate 1a of the casing 1, the air enteringthe pipes 10 through the pipes 4 and travelling upward through the pipes10 becoming heated in its passage passes out of the Lipper end of theheater, as shown by the arrows. This air, in its travel, does not mixwith any fumes at any point throughout the apparatus. These stand pipes-10 .which are shown perpendicular Iplay be made of any appropriatedesired s ape.

Arranged within the space which is encircled by the stand pipes 10 is ashell 22 open at its top and closed at its bottom and vwith its openupper end spacedfrom the top 1a and the casing 1, as is shown clearly inFig. 1. Located within the shell 22 is a fume pipe 23 which extends froma point spaced from the bottom of shell 22 up through said shell andthrough the top la -where it discharges into a pipe or other exit 24. Asshown in the drawing the pipe 24 is equipped with a fume diffusing cap25.

The arrangement of the fume pipe 23 and shell 22 produces a down draftfor the products of combustion as is shown by the arrow-s An annularbottom plate 10a is arranged rat the lower end of the casing 1 and aper-Vtured for-the passage therethrough of the stand pipes 10 and the tubes6 the open central portion 10b of which is arranged directly over theburners so that the iiames therefrom will pass up through this openinginto the interior of the flame shell.

In the forms shown in Fig. 4, the structure of the heater is the sameexcept that a blower 30 is used for forcing fresh air up through t-hestandpipes 10 and the tubes 6 said blower being equipped with adischarge member 31 with its upper end encompassing the lower end of thestand pipes and the pipes -which supply air to the burners 15. Theblower 30 may be operated by any suitable means, notY shown.

In the form shown in Fig. 7, elect-ric heating coils are used for theheating medium `instead of the gas burners 15 shown in the othervfigures. In this form of the invention the casing 1 is similar to thatshown in the other figures and is mounted on a hollow base`2 which maybe provided either with a blower or not, as` desired, the blower in thisinstance being similar to that shown at 30 in Fig. 4.

Arranged within the space which is encircled by the stand pipes 10 are aplurality o f electric heating coils here shown arranged Vin threegroups, numbered 32, 33 and 34.

Four coils are here shown in each group and each groupis arranged withina circuit controlled by a switch or plug 35, here shown carried byavthree way socket 36. It will thus be seen that each group of heatingcoils or resistances are independent one of the other and may becont-rolled independently so that one group may be turned on when theweather is moderate and when more heat is required, the second groupwill be turned on, and when still further heat is wanted, the thirdgroup may be turned on. This heating of the resistance coils willoperate in the same manner as the burners 15 which are shown in theother gures, to heat the air within the casing l and then passing upthrough the stand pipes 10.

The -top 37 is provided with an upstanding flange 38 adjacent itsperiphery which supports a dome-shaped wire net covering 39 designed toprotect the stand pipes and prevent insects and articles from droppingdown into them. At the apex of this cover 39 is a collared opening 40for the entrance of the wires W which supply the current for the heatingcoils.

From the above description, it will be obvious that in any of the formsillustrated, the heater will operate to supply heat by radiation, aswell as to discharge heated airl therefrom, and also to circulate freshair into the room in connection with which it is used.

It will be obvious that when a blower is not used to force fresh airthrough the heat-` Vportion and minor details of construction may beresorted to, without departing from the spirit of the invention or itsscope as claimed. Y Y Y 1. A heater of the class described comprising acylindrical casing closed at its top and havingv an vannular closure atits bottom, a flame shell arranged concentrically within said casing andspaced therefrom, said shell extending parallel with the entire lengthof the casing, fresh air supply tubes opening through the bottoni of thecasingbetween it and the flame shell, the top ofthe casing between itand the flame shell being provided with apertures for the outlet of theair, stand pipes extending longitudinally within said flame shell andopening through the top thereof and extending below the bottom, andmeans for heating the interior of the casing including the Vair passingthrough the stand pipes.

2. A heater of the class described comprisinga casing closed at its topand having an annular bottom providing an opening therein disposedover aheating unit, a flame shell arranged concentrically within said casingand extending parallel with the length thereof and spaced therefrom toprovde an air space between it and the casing,

a. plurality of tubes extending upwardly open at its top and closed atits bottom, the through the bottom of the casing and disopen upper endthereof bein spaced from charging into the space between the casing thetop of the casing, and a umes pipe eX- l. and the flame shell, the topof said casing tending through the top of said casing into 5 havingoutlet o enings leading from the said last-mentloned shell to a pointnear the space between t e casing and the shell, a bottom thereof. shellmounted in said flame shell which is HENRY V. DEEMAR.

